09Factor

The Automatics do not have a flywheel. It's called a "flex plate" and it only two uses are
1. for the starter to spin the motor over
2. the Torque converter bolts to it.

So replacing the flexplate on any automatic reaps no benefits.

Rud'X8

Thanks 09factor,
so my next question, i haven't seen anything on Under-drive pulleys,
turbo charged vs supercharged, not looking for a 500hp 300 will be just fine.

Easy_E1

iTrader: (2)

Under-drive pulleys are strictly an appearance mod. They do nothing.
Your best bet for an increase in HP for the AT is a Forced Induction system of some type. Either Turbo, Supercharger or Nitrous.
Nitrous can get you to 200WHP and Turbo and Supercharger will get you to 300WHP.
With the right set up and tune.

m1r4g3

iTrader: (1)

trade auto and get a manual

Rud'X8

well unfortunately that was the only one available, for the price, condition and mileage of the car hey! couldnt walk away just because it was an auto, lol..
i know of a shop that can mod the torque converter , they specializes in Rx out of Puerto-Rico , will see what happens will update.

as for the mixture 2cycle for a full tank what do you advise? and what is the best oil so far ?

mdw1000

I run 4 0z of Idemitsu premix for a 10 gallon fill up. If you fill up when the gas gauge gets down to about a quarter tank, it will be about ten gallons. If you are off a little bit no big deal.

cfm251

iTrader: (3)

5mt swap...when someone gets the formula down

cfm251

iTrader: (3)

if I were to keep it sub $500, id go like this.

K&N panel filter (cheapest) $50
DIY airbox mod FREE
Racing bear ram air duct can be had for $100
breather filter $5
Throttle body bypass sub $10
midpipe $150

Stainless Magnaflow muffler $60+~$60 labor
(using stock exhaust tips)
pair of shiny exhaust tips $40 (optional)
~$160

$475 for a different sounding car and a few ponies. Id get that Accessport soon though the stock on em is running dry

bren5279

iTrader: (15)

sounds interesting, What exactly do they do? I would immagine just putting in slightly more viscus fluid would have the same effect though..?

Tamas

iTrader: (1)

That's sure to add some much needed speed

tayloRotary

and would it be 10 grand if you can get a turbo kit for 2 grand and know people to help you put it in ? or doest turbo'ing a diff tranny make it more expensive ? i want turbo in my 4at so bad its not funny but i dont want over 300. ive heard ill be fine long as i dont spin the motor above 7 thousand rpm just cause its a 4 port. any advice or input on that ?

tayloRotary

bump

ronx8

for the 4AT you wont see numbers over 300rwhp.
you can rev up to 8k i believe.
just because you are auto doesnt mean it is more expensive, but remember you will need to find someone to tune the car to the 4AT specs. Mazda maniac and a cobb AP will do.

you can probably find a used greddy kit for around 2500 on the for sale threads. but it doesnt mean its a reliable set up. professional installation would be around 800-1000. you need to do a few fixes to the base greddy kit as well. and there are a few supporting mods to make it a reliable set up. so yes, you are looking at around 4000-8000 depending on how much power you want and how reliable you want it.

MazdaManiac

iTrader: (3)

You can take the 4AT all the way up to 10k RPM, if you like. No real reason to do it, though.

Phil's Petit SC'ed 4AT will likely cross the 300 HP line at some point in the near future.

09Factor

Cost of said forced induction is proportional to desired power output. A better designed FI'd system with trusted quality parts will always cost more. You want it to flow air in the motor just as well as it will handle the escaping hot burnt gases.

The one place the Greddy kit falls way short, is the tightly radiused bends in it's exhaust manifold.

No.
Over 300hp, or under 300hp, that is your prerogative.
the 4port like MM stated dosen't flow any better above 7k. Sure you can, but no benefit i see.
Uh-huh. keep telling yourself that.

tayloRotary

there's a guy selling a top mount turbo kit on the for sale thread here , for 3100 and he lives like , 5 minutes away from me. im going to see the system in person and check it out , the exhaust mani is custom. what i dont want is OVER 300 , it will most likely get me into trouble which i dont need at 20 lol , and the fact , like said before , too much of a load on the motor. and a cobb AP will solve my tuning issues for the 4at ? what would you guys suggest for me wanting to go turbo with the 4at ? is it not done often for a reason ?

Josh.miller

How do ppl with the auto 8's raise the rev limiter?

slvrstreak

iTrader: (3)

taylo - most people dont want to waste the time on and auto not to mention the shorten engine life, mpg, etc

josh - Cobb AP

ronx8

09factor

Im not denying it cant make 300rwhp... it just hasn't been done yet.

ronx8

Also, has anyone swapped a carbon fiber drive shaft into the AUTO?

Would there be a decent gain from this since its lighter rotating mass?

Phil's 8

iTrader: (3)

Save your money.......does not show any help

Soon will be

Cobb AP and MM

Brettus

iTrader: (2)

Really ?
That poor SC will be wound off the clock .....

sinned2545

I think it all boils down to "Money for Power". In my opinion Its not worth putting 10k for a few extra horses.

As MazdaManiac Said "For FI, the 4-port can do up to almost 300, though the numbers are typically right around 200."

Plus the Rx8 is a handling car... If had 500 to spend on a 8 I would get an exhaust for the sound and make suspension upgrades along with tires.

My friends Rx8 only has a exhaust and intake. No cob, No coils, no midpipe. And he can keep up with 400hp Rx7 cause of the handling.

Again probably not worth the money for the power gain.

ronx8

thanks for the quick replies.

and i knew phil would pop up...

tayloRotary

very true .. i just want to be diff and ill do the smartest option .. just doing some research